Complement (set)
All elements (from a Universal set) NOT in our set.
Example: With a Universal set of all faces of a dice {1,2,3,4,5,6}
Then the complement of {5,6} is {1,2,3,4}.
Symbol is a little dash in the top-right corner.
Example: A' = {1,2,3,4}
Or a little "C" in the top-right corner.
Example: AC = {1,2,3,4}
Together the set and its complement make the Universal set.
Another Example: In the set below the Universal set is {alex, blair, casey, drew, erin, francis, glen, hunter, ira, jade} and the complement of set "S" is:
SC = {blair, erin, francis, glen, ira, jade}
Example: With a Universal set of all faces of a dice {1,2,3,4,5,6}
Then the complement of {5,6} is {1,2,3,4}.
Symbol is a little dash in the top-right corner.
Example: A' = {1,2,3,4}
Or a little "C" in the top-right corner.
Example: AC = {1,2,3,4}
Together the set and its complement make the Universal set.
Another Example: In the set below the Universal set is {alex, blair, casey, drew, erin, francis, glen, hunter, ira, jade} and the complement of set "S" is:
SC = {blair, erin, francis, glen, ira, jade}
See: Complement (probability)
